(b)  
Read the amperage and write it for step 2 of Figure 609.

 S 866-196
 (4)
Put the arm switch for the ALTERNATE FLAPS in the OFF position.

 S 866-198

 (5)  
Put the FLT CONTROL A and the FLT CONTROL B switches in the OFF position.

 S 866-197

 (6)  
Stop until the pressure in all of the hydraulic systems is less than 100 psi.

 S 016-199
 WARNING: DO NOT MOVE THE RUDDER PEDALS DURING THE REMAINING STEPS IN
_______ THIS PROCEDURE. THE RUDDER AND ITS PARTS CAN MOVE AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (7)  Get access to the input crank for the standby rudder actuator through the access door on the right side of the vertical fin (Fig. 607).
 NOTE: We recommend you access the standby rudder actuator
____ from forward of the horizontal stabilizer on the right side of the airplane.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
STANDBY RUDDER ACTUATOR SEE A  ACCESS DOOR 
FIN STRUCTURE 
BOLT 
ACTUATOR STANDBY RUDDER 
RUDDER  INDEX MARKS  BOLT INPUT CRANK INPUT ROD  FWD  TUBE TORQUE 
A 

Standby Rudder Actuator
Figure 607

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (a)  Disconnect the input rod from the input crank and the torque tube (Fig. 607). Remove the input rod.
 NOTE: Keep the bolts and the input rod.
____
 S 866-200
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES. THE AILERONS, RUDDER, ELEVATOR, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (8)  
Supply hydraulic power to hydraulic system B (AMM 29-15-00/201).

 S 866-203

 (9)  
Put the FLT CONTROL B switch in the B ON position.

 NOTE: The rudder must have pressure from hydraulic system B or it
____
 will move rapidly.

 S 796-204
 (10) Put the arm switch for the ALTERNATE FLAPS in the ARM position.
 (a)  
Stop until the flow is stable.

 (b)  
Read the amperage and write it for step 3 of Figure 609.

 S 866-205
 (11)
 Put the FLT CONTROL A switch in the STDBY RUD position.

 S 866-238

 (12)
 Move the input crank on the standby rudder actuator fully aft and hold it there for one minute.

 (a)  Keep the input crank fully aft. Read the amperage and write it for step 4 of Figure 609.
 NOTE:____On some airplanes, the rudder may move slowly. If the rudder moves, do not take the amperage reading until the rudder has stopped moving.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 796-207
 (13) Move the input crank on the standby rudder actuator fully forward and hold it there for one minute.
 (a)  Keep the input crank fully forward. Read the amperage and write it for step 5 of Figure 609.
 NOTE:____On some airplanes, the rudder may move slowly. If the rudder moves, do not take the amperage reading until the rudder has stopped moving.
 S 976-208
 (14)
 Use Figure 609 to calculate the leakages for the standby rudder actuator. Make sure they are not more than the maximum leakages.
　
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